Useful tip worth sharing I found from a fellow Treonaut:-
Use a registry editor and change the registry value "HKLM\SOFTWARE\Palm\Varnish\SpeedDialPlugin\VoiceM ail\IngoreSIM" to 1 (decimal value)
Then change the value of "HKLM\SOFTWARE\Palm\Varnish\SpeedDialPlugin\VoiceM ail\Deletable"
to 1 (decimal value)
Then go to the Speedial options
Click on "Voicemail" button to edit it and select a contact with a Photo
Click option for Picture speed dial
Voicemail is now gone, and u are left with only your contact picture speeddials